Planoqrapji co



H. S. HART.

LOCKING MECHANISM FOR CAR DOORS.

APPLICATION FILED 00125, I911.

1 ,308,41 8 Patented July 1, 1919.

2 SHEETSSHEET l ms COLUMBIA PLANOGRAPI! 60.. WASHINGTON, D. c

H. S. HART.

LOCKING MECHANISM FOR CAR DOORS.

APPLICATION FILED OCT. 25. 917- Patented July 1, 1919.

2 SHEETS-SHEET 2.

Inf/275557.- HQ? 5%7 6.

THE COLUMBIA PLANOGRAPH c0.. WASHINGTON, D. C.

HARRY s. HART, or criterion, ILLINOIS.

Looirnve ivinonaivlsivironcan-nouns;

Application fileddctober 25,1917; SerialNo.198,3S4;

T 0 all whom it may concern 1 Be it known that I, HARRY S. HART, a citizen of the United States, and resident of Chicago, in the county of Cook and State of Illinois,have invented certain new and useful Improvements in Looking Mechanism for Car-Doors, of which the following is a specification. a

This invention relates to railway cars, and more particularly to locking mechanism for the doors ofsuch cars.

One of the objects of the invention is to make it necessary to close or actuate a given door of a railway car a predetermined amountbefore a second given door can be closed or actuated a predetermined amount.

Another object is to make certain that cattle before the side doors of the car are closed.

These and other objects are accomplished by providing, in a railway car, the combina tion of a plurality of car doors located in different parts ofthe car, and means where by said doors must be closed in .a given sequence.

The invention is illustrated onthe accompanying sheets of drawings, in which i Figure 1 is a fragmentary side elevation of a freight car embodying my invention; and, r a

Fig. 2 is a fragmentary sectional view of the same showing one of t-hefloor doors closed and another of the floor doors opened, with the locking mechanism in each case being in a corresponding position. y

The various novel features of myinvention will be apparent from the following description and drawings and, will be parti cularly pointed out in the appended claims.

This invention has particular reference to: that type of railway freight car which has doors in its floor and also at the sides, whereby the car not only may be used for carry ing various kinds of material which may be dumped by operating the doors, but also a car which is suitable for carrying cattle and thelike, in which case it is necessary that the drop doors be positively locked in their upper or closed position. llf these drop doors in the floorof the car are raised to: their full closed position before the side doors are closed, it is rather safe to assume that these drop doors will not accidentally move into an opened position to dump the Specification bf LettersPa tent.

reamed an '1, 191a merchandise or cattle onto the tracks.

Therefore, Ihavc provided means whereby H itis necessary to move thedoors in the floor ofythe car into their raised or closed position before the side doorsmay be closed.

By referring to the figures of the drawlngs, it will be noted that I have shown a freightcar l0 havingrenter sill members 11 and side sill members 12, which respectively support portions of the floor 13 and thesides 14, including the side stakes 15. Suitably pivotally connected to the floor structure of thecar area plurality of drop doors 16 and 17 respectively mounted onopposite sides of the center line of the car. These doors form a portion of the floor of the car and normally are retained in a raisedposition by operating shafts 18, which carrydisks 1 9 engageable with a metal band 20' secured to the under part of the drop doors. As shown in the left-hand half of Fig. 2, the disk 19 is engaging the lowest point of the strap 20 to hold thedoor 16 in its elevated position.

The shaft 18 is laterally movable irfian elongated slot 21 in a transversely extending frame member 22 of the car. The shaftIS maybe actuated in, either direction by any suitable means. When theshaft 18 is in a position to hold the drop doors in their closedposition, said shaft 18 engages the lower end of a lever 23, which'is pivoted intermediate its ends to a casting 24; secured to theside sill 12. Pivotally connected to the upper end of the lever 23 by a loose joint is a pin 25 which extendslaterallythrough anopening in the side sillstructure. Inter posed between the lower end of the lever 23 and a casting 26 on the side sill, is a resilient member or spring 27 whichis retained in position by cooperating retaining lugs 28 and 29andf w-hichnorinally tends to press the lower end of the lever towardthe center of the car, thereby tending to press the pin 25 outwardly to project the outer end of the pin 25 intothe path of movement of a, casting 30 secured to one lower corner of the side door 31. The side door, 1 in each case, is actuated in its sliding movement longitudinally with respect to thecar on a rod 36 which is embracedby thecasting 30, and a lower part of the lever 23 with the necessary force to overcome the compressive stren th of the spring 27 to' dr awthe pin inwardly beyond the path of movement of the casting 30 on side door 31. When the drop doors 16 are raised and the operating shaft 18 is in itssupporting position, the side door 31 may be moved from its extreme open position to its extreme closed position, and under thesecircumstances, if it is possible to move the side door from its extreme open position toits extreme closed position, it is certain that the dropdoors are closed on that side of the car to insure safe transit of live stock.

By referring to the right-hand half of Fig. 2, it will be noted that the operating shaft 33 has been moved to its inner position, whereupon the drop doors on that side of the car were free to move into their lower or open position. Under such circumstances, the spring 34 presses the pin 35 outwardly to prevent the side door from moving from an open position to a closed position. To raise the drop doors 17 into their closed position, it is merely necessary to actuate the operating shaft 33 to its outward limit of movement, whereupon the drop doors 17 will be held positively in their closed positions and the pin 35 will be withdrawn from the path ofmovement f the other side door 37. This side door, then, may be closed. In this way live stock may be insured safe transportation.

It is apparent that there may be modifications of the invention as herein particularly shownfanddescribed, and it is my intention to cover all such modifications which do not involve a departure from the spirit and scope of the invention as set forth in the following claims.

I claim:

1. In a railway car, the combination of a movably mounted door in the floor of the car, a side door, andme'ans whereby the door in the floor of the car must be closed before the side door can be closed.

2. In a railway car, the combination of a movably mounted door in the floor of the car, a side door, and means associated with said doors whereby the door in the floor of the car must be closed before the side door can'b'e closed.

' 3. In a railway car, the combination of a plurality of movably mounted doors located indifferent parts of the car, and means wherebyv one of said doors must be closed before another of said doors can be closed.

4. In a railway car, the combination of a plurality of movably mounted doors in different parts of the car, and means associated with said doors whereby one of said doors must be closed before another of said doors can be closed.

5. In a railway car, the combination of a plurality of our doors located in different parts of the car, and means whereby the same must be closed in a given sequence.

6. In a railway car, the combination of a plurality of car doors located in di'lferent parts of the car, and means associated with said doors whereby the same must be closed in a given sequence.

7. In a railway car, the combination of a plurality of movably mounted doors located in different parts of the car, and means whereby one of said doors must be moved to a closed position: before another of said doors can be moved from one extreme posi tion to another.

8. In a railway car, the combination of a plurality of movably mounted doors located in different parts of the car, and means whereby one of said doors must be actuated apredetermined amount before another of said doors can be actuated a predetermined amount.

9. In a railway car, the combination of a movably mounted door in the floor of the car, a side door for said car, and means whereby the floor door must be moved into a position to sustain a load in the car be fore the side door can be closed.

10. In a railway car, the combination of a plurality of movably mounted doors located in different parts of the car, and spring-pressed means whereby it is necessary for one of said doors to be actuated a predetermined amount before another of said doors may be actuated a predetermined amount.

11. In a railway car, a movably mounted door in the floor of the car, a side door for the car, an operating haft. normally supporting the floor door in its closed position, and means controlled by said operating shaft whereby the side door can be closed only after the shaft has moved into a position to support the door in the floor of the car.

12. In a railway car, the combination of a movably mounted door in the floor of the car, an operating shaft normally sustaining the door in its closed position, a side door for the car, a lever, and a member con-- nected to said lever, said lever being controlled by said operating shaft whereby the member may permit or prevent a predetermined movement of the side door.

Signed at Chicago, Illinois, this 17th day of October, 1917.

. HARRY S. HART.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

. Washington, D. C. 

